/* CSS 代码 */
table {
    border-collapse: collapse;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    font-family: Arial, sans-serif;
}
th, td {
    border: 1px solid #ddd;
    padding: 12px 15px;
    text-align: center;
}
th {
    background-color: #f8f8f8;
    font-weight: bold;
}
tr:last-child {
    background-color: #e6f2ff;
    font-weight: bold;
}